102212112202021 has 4 divisors (see below), whose sum is σ = 103737666115552. Its totient is φ = 100686558288492.

The previous prime is 102212112201989. The next prime is 102212112202063. The reversal of 102212112202021 is 120202211212201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102212112202021 - 2⁵ = 102212112201989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102212112202021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102212112202091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762776956665 + ... + 762776956798.

It is an arithmetic number, because the mean of its divisors is an integer number (25934416528888).

Almost surely, 2^{102212112202021} is an apocalyptic number.

It is an amenable number.

102212112202021 is a deficient number, since it is larger than the sum of its proper divisors (1525553913531).

102212112202021 is an equidigital number, since it uses as much as digits as its factorization.

102212112202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525553913530.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 102212112202021 its reverse (120202211212201), we get a palindrome (222414323414222).

The spelling of 102212112202021 in words is "one hundred two trillion, two hundred twelve billion, one hundred twelve million, two hundred two thousand, twenty-one".